ci: enable Win32 long paths in CI build pipeline

Add registry fix to set LongPathsEnabled=1 as the first build step
to resolve ENOENT errors caused by paths exceeding the 260-character
MAX_PATH limit when all modules are built in a single agent workspace.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: ramsessanchez

.azure-pipelines/ci-build.yml

@@ -74,6 +74,9 @@ extends:
               artifactName: 'drop'
               publishLocation: 'Container'
         steps:
+        - script: |
+            reg add "HKLM\SYSTEM\CurrentControlSet\Control\FileSystem" /v LongPathsEnabled /t REG_DWORD /d 1 /f
+          displayName: "Enable Win32 long paths"
         - script: |
             git submodule update --init --recursive
         - template: .azure-pipelines/common-templates/install-tools.yml@self